icuSources/common/norm2allmodes.h

   1 // © 2016 and later: Unicode, Inc. and others.
   2 // License & terms of use: http://www.unicode.org/copyright.html
   3 /*
   4 *******************************************************************************
   5 * Copyright (C) 2014, International Business Machines
   6 * Corporation and others.  All Rights Reserved.
   7 *******************************************************************************
   8 * loadednormalizer2impl.h
   9 *
  10 * created on: 2014sep07
  11 * created by: Markus W. Scherer
  12 */
  13
  14 #ifndef __NORM2ALLMODES_H__
  15 #define __NORM2ALLMODES_H__
  16
  17 #include "unicode/utypes.h"
  18
  19 #if !UCONFIG_NO_NORMALIZATION
  20
  21 #include "unicode/normalizer2.h"
  22 #include "unicode/unistr.h"
  23 #include "cpputils.h"
  24 #include "normalizer2impl.h"
  25
  26 U_NAMESPACE_BEGIN
  27
  28 // Intermediate class:
  29 // Has Normalizer2Impl and does boilerplate argument checking and setup.
  30 class Normalizer2WithImpl : public Normalizer2 {
  31 public:
  32     Normalizer2WithImpl(const Normalizer2Impl &ni) : impl(ni) {}
  33     virtual ~Normalizer2WithImpl();
  34
  35     // normalize
  36     virtual UnicodeString &
  37     normalize(const UnicodeString &src,
  38               UnicodeString &dest,
  39               UErrorCode &errorCode) const {
  40         if(U_FAILURE(errorCode)) {
  41             dest.setToBogus();
  42             return dest;
  43         }
  44         const UChar *sArray=src.getBuffer();
  45         if(&dest==&src || sArray==NULL) {
  46             errorCode=U_ILLEGAL_ARGUMENT_ERROR;
  47             dest.setToBogus();
  48             return dest;
  49         }
  50         dest.remove();
  51         ReorderingBuffer buffer(impl, dest);
  52         if(buffer.init(src.length(), errorCode)) {
  53             normalize(sArray, sArray+src.length(), buffer, errorCode);
  54         }
  55         return dest;
  56     }
  57     virtual void
  58     normalize(const UChar *src, const UChar *limit,
  59               ReorderingBuffer &buffer, UErrorCode &errorCode) const = 0;
  60
  61     // normalize and append
  62     virtual UnicodeString &
  63     normalizeSecondAndAppend(UnicodeString &first,
  64                              const UnicodeString &second,
  65                              UErrorCode &errorCode) const {
  66         return normalizeSecondAndAppend(first, second, TRUE, errorCode);
  67     }
  68     virtual UnicodeString &
  69     append(UnicodeString &first,
  70            const UnicodeString &second,
  71            UErrorCode &errorCode) const {
  72         return normalizeSecondAndAppend(first, second, FALSE, errorCode);
  73     }
  74     UnicodeString &
  75     normalizeSecondAndAppend(UnicodeString &first,
  76                              const UnicodeString &second,
  77                              UBool doNormalize,
  78                              UErrorCode &errorCode) const {
  79         uprv_checkCanGetBuffer(first, errorCode);
  80         if(U_FAILURE(errorCode)) {
  81             return first;
  82         }
  83         const UChar *secondArray=second.getBuffer();
  84         if(&first==&second || secondArray==NULL) {
  85             errorCode=U_ILLEGAL_ARGUMENT_ERROR;
  86             return first;
  87         }
  88         int32_t firstLength=first.length();
  89         UnicodeString safeMiddle;
  90         {
  91             ReorderingBuffer buffer(impl, first);
  92             if(buffer.init(firstLength+second.length(), errorCode)) {
  93                 normalizeAndAppend(secondArray, secondArray+second.length(), doNormalize,
  94                                    safeMiddle, buffer, errorCode);
  95             }
  96         }  // The ReorderingBuffer destructor finalizes the first string.
  97         if(U_FAILURE(errorCode)) {
  98             // Restore the modified suffix of the first string.
  99             first.replace(firstLength-safeMiddle.length(), 0x7fffffff, safeMiddle);
 100         }
 101         return first;
 102     }
 103     virtual void
 104     normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
 105                        UnicodeString &safeMiddle,
 106                        ReorderingBuffer &buffer, UErrorCode &errorCode) const = 0;
 107     virtual UBool
 108     getDecomposition(UChar32 c, UnicodeString &decomposition) const {
 109         UChar buffer[4];
 110         int32_t length;
 111         const UChar *d=impl.getDecomposition(c, buffer, length);
 112         if(d==NULL) {
 113             return FALSE;
 114         }
 115         if(d==buffer) {
 116             decomposition.setTo(buffer, length);  // copy the string (Jamos from Hangul syllable c)
 117         } else {
 118             decomposition.setTo(FALSE, d, length);  // read-only alias
 119         }
 120         return TRUE;
 121     }
 122     virtual UBool
 123     getRawDecomposition(UChar32 c, UnicodeString &decomposition) const {
 124         UChar buffer[30];
 125         int32_t length;
 126         const UChar *d=impl.getRawDecomposition(c, buffer, length);
 127         if(d==NULL) {
 128             return FALSE;
 129         }
 130         if(d==buffer) {
 131             decomposition.setTo(buffer, length);  // copy the string (algorithmic decomposition)
 132         } else {
 133             decomposition.setTo(FALSE, d, length);  // read-only alias
 134         }
 135         return TRUE;
 136     }
 137     virtual UChar32
 138     composePair(UChar32 a, UChar32 b) const {
 139         return impl.composePair(a, b);
 140     }
 141
 142     virtual uint8_t
 143     getCombiningClass(UChar32 c) const {
 144         return impl.getCC(impl.getNorm16(c));
 145     }
 146
 147     // quick checks
 148     virtual UBool
 149     isNormalized(const UnicodeString &s, UErrorCode &errorCode) const {
 150         if(U_FAILURE(errorCode)) {
 151             return FALSE;
 152         }
 153         const UChar *sArray=s.getBuffer();
 154         if(sArray==NULL) {
 155             errorCode=U_ILLEGAL_ARGUMENT_ERROR;
 156             return FALSE;
 157         }
 158         const UChar *sLimit=sArray+s.length();
 159         return sLimit==spanQuickCheckYes(sArray, sLimit, errorCode);
 160     }
 161     virtual UNormalizationCheckResult
 162     quickCheck(const UnicodeString &s, UErrorCode &errorCode) const {
 163         return Normalizer2WithImpl::isNormalized(s, errorCode) ? UNORM_YES : UNORM_NO;
 164     }
 165     virtual int32_t
 166     spanQuickCheckYes(const UnicodeString &s, UErrorCode &errorCode) const {
 167         if(U_FAILURE(errorCode)) {
 168             return 0;
 169         }
 170         const UChar *sArray=s.getBuffer();
 171         if(sArray==NULL) {
 172             errorCode=U_ILLEGAL_ARGUMENT_ERROR;
 173             return 0;
 174         }
 175         return (int32_t)(spanQuickCheckYes(sArray, sArray+s.length(), errorCode)-sArray);
 176     }
 177     virtual const UChar *
 178     spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &errorCode) const = 0;
 179
 180     virtual UNormalizationCheckResult getQuickCheck(UChar32) const {
 181         return UNORM_YES;
 182     }
 183
 184     const Normalizer2Impl &impl;
 185 };
 186
 187 class DecomposeNormalizer2 : public Normalizer2WithImpl {
 188 public:
 189     DecomposeNormalizer2(const Normalizer2Impl &ni) : Normalizer2WithImpl(ni) {}
 190     virtual ~DecomposeNormalizer2();
 191
 192 private:
 193     virtual void
 194     normalize(const UChar *src, const UChar *limit,
 195               ReorderingBuffer &buffer, UErrorCode &errorCode) const {
 196         impl.decompose(src, limit, &buffer, errorCode);
 197     }
 198     using Normalizer2WithImpl::normalize;  // Avoid warning about hiding base class function.
 199     virtual void
 200     normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
 201                        UnicodeString &safeMiddle,
 202                        ReorderingBuffer &buffer, UErrorCode &errorCode) const {
 203         impl.decomposeAndAppend(src, limit, doNormalize, safeMiddle, buffer, errorCode);
 204     }
 205     virtual const UChar *
 206     spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &errorCode) const {
 207         return impl.decompose(src, limit, NULL, errorCode);
 208     }
 209     using Normalizer2WithImpl::spanQuickCheckYes;  // Avoid warning about hiding base class function.
 210     virtual UNormalizationCheckResult getQuickCheck(UChar32 c) const {
 211         return impl.isDecompYes(impl.getNorm16(c)) ? UNORM_YES : UNORM_NO;
 212     }
 213     virtual UBool hasBoundaryBefore(UChar32 c) const { return impl.hasDecompBoundary(c, TRUE); }
 214     virtual UBool hasBoundaryAfter(UChar32 c) const { return impl.hasDecompBoundary(c, FALSE); }
 215     virtual UBool isInert(UChar32 c) const { return impl.isDecompInert(c); }
 216 };
 217
 218 class ComposeNormalizer2 : public Normalizer2WithImpl {
 219 public:
 220     ComposeNormalizer2(const Normalizer2Impl &ni, UBool fcc) :
 221         Normalizer2WithImpl(ni), onlyContiguous(fcc) {}
 222     virtual ~ComposeNormalizer2();
 223
 224 private:
 225     virtual void
 226     normalize(const UChar *src, const UChar *limit,
 227               ReorderingBuffer &buffer, UErrorCode &errorCode) const {
 228         impl.compose(src, limit, onlyContiguous, TRUE, buffer, errorCode);
 229     }
 230     using Normalizer2WithImpl::normalize;  // Avoid warning about hiding base class function.
 231     virtual void
 232     normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
 233                        UnicodeString &safeMiddle,
 234                        ReorderingBuffer &buffer, UErrorCode &errorCode) const {
 235         impl.composeAndAppend(src, limit, doNormalize, onlyContiguous, safeMiddle, buffer, errorCode);
 236     }
 237
 238     virtual UBool
 239     isNormalized(const UnicodeString &s, UErrorCode &errorCode) const {
 240         if(U_FAILURE(errorCode)) {
 241             return FALSE;
 242         }
 243         const UChar *sArray=s.getBuffer();
 244         if(sArray==NULL) {
 245             errorCode=U_ILLEGAL_ARGUMENT_ERROR;
 246             return FALSE;
 247         }
 248         UnicodeString temp;
 249         ReorderingBuffer buffer(impl, temp);
 250         if(!buffer.init(5, errorCode)) {  // small destCapacity for substring normalization
 251             return FALSE;
 252         }
 253         return impl.compose(sArray, sArray+s.length(), onlyContiguous, FALSE, buffer, errorCode);
 254     }
 255     virtual UNormalizationCheckResult
 256     quickCheck(const UnicodeString &s, UErrorCode &errorCode) const {
 257         if(U_FAILURE(errorCode)) {
 258             return UNORM_MAYBE;
 259         }
 260         const UChar *sArray=s.getBuffer();
 261         if(sArray==NULL) {
 262             errorCode=U_ILLEGAL_ARGUMENT_ERROR;
 263             return UNORM_MAYBE;
 264         }
 265         UNormalizationCheckResult qcResult=UNORM_YES;
 266         impl.composeQuickCheck(sArray, sArray+s.length(), onlyContiguous, &qcResult);
 267         return qcResult;
 268     }
 269     virtual const UChar *
 270     spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &) const {
 271         return impl.composeQuickCheck(src, limit, onlyContiguous, NULL);
 272     }
 273     using Normalizer2WithImpl::spanQuickCheckYes;  // Avoid warning about hiding base class function.
 274     virtual UNormalizationCheckResult getQuickCheck(UChar32 c) const {
 275         return impl.getCompQuickCheck(impl.getNorm16(c));
 276     }
 277     virtual UBool hasBoundaryBefore(UChar32 c) const {
 278         return impl.hasCompBoundaryBefore(c);
 279     }
 280     virtual UBool hasBoundaryAfter(UChar32 c) const {
 281         return impl.hasCompBoundaryAfter(c, onlyContiguous, FALSE);
 282     }
 283     virtual UBool isInert(UChar32 c) const {
 284         return impl.hasCompBoundaryAfter(c, onlyContiguous, TRUE);
 285     }
 286
 287     const UBool onlyContiguous;
 288 };
 289
 290 class FCDNormalizer2 : public Normalizer2WithImpl {
 291 public:
 292     FCDNormalizer2(const Normalizer2Impl &ni) : Normalizer2WithImpl(ni) {}
 293     virtual ~FCDNormalizer2();
 294
 295 private:
 296     virtual void
 297     normalize(const UChar *src, const UChar *limit,
 298               ReorderingBuffer &buffer, UErrorCode &errorCode) const {
 299         impl.makeFCD(src, limit, &buffer, errorCode);
 300     }
 301     using Normalizer2WithImpl::normalize;  // Avoid warning about hiding base class function.
 302     virtual void
 303     normalizeAndAppend(const UChar *src, const UChar *limit, UBool doNormalize,
 304                        UnicodeString &safeMiddle,
 305                        ReorderingBuffer &buffer, UErrorCode &errorCode) const {
 306         impl.makeFCDAndAppend(src, limit, doNormalize, safeMiddle, buffer, errorCode);
 307     }
 308     virtual const UChar *
 309     spanQuickCheckYes(const UChar *src, const UChar *limit, UErrorCode &errorCode) const {
 310         return impl.makeFCD(src, limit, NULL, errorCode);
 311     }
 312     using Normalizer2WithImpl::spanQuickCheckYes;  // Avoid warning about hiding base class function.
 313     virtual UBool hasBoundaryBefore(UChar32 c) const { return impl.hasFCDBoundaryBefore(c); }
 314     virtual UBool hasBoundaryAfter(UChar32 c) const { return impl.hasFCDBoundaryAfter(c); }
 315     virtual UBool isInert(UChar32 c) const { return impl.isFCDInert(c); }
 316 };
 317
 318 struct Norm2AllModes : public UMemory {
 319     Norm2AllModes(Normalizer2Impl *i)
 320             : impl(i), comp(*i, FALSE), decomp(*i), fcd(*i), fcc(*i, TRUE) {}
 321     ~Norm2AllModes();
 322
 323     static Norm2AllModes *createInstance(Normalizer2Impl *impl, UErrorCode &errorCode);
 324     static Norm2AllModes *createNFCInstance(UErrorCode &errorCode);
 325     static Norm2AllModes *createInstance(const char *packageName,
 326                                          const char *name,
 327                                          UErrorCode &errorCode);
 328
 329     static const Norm2AllModes *getNFCInstance(UErrorCode &errorCode);
 330     static const Norm2AllModes *getNFKCInstance(UErrorCode &errorCode);
 331     static const Norm2AllModes *getNFKC_CFInstance(UErrorCode &errorCode);
 332
 333     Normalizer2Impl *impl;
 334     ComposeNormalizer2 comp;
 335     DecomposeNormalizer2 decomp;
 336     FCDNormalizer2 fcd;
 337     ComposeNormalizer2 fcc;
 338 };
 339
 340 U_NAMESPACE_END
 341
 342 #endif  // !UCONFIG_NO_NORMALIZATION
 343 #endif  // __NORM2ALLMODES_H__